Patents by Inventor Hugh A. Stiffler

Hugh A. Stiffler has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Stirring device
    Patent number: 4083653
    Abstract: A stirring device employs a shaft-mounted hub with five axially nested, radially extendable fins shaped to not only provide compact nesting of five fins to enter a bung opening of a drum, but also to provide ample surface area when extended for stirring.
    Type: Grant
    Filed: February 14, 1977
    Date of Patent: April 11, 1978
    Inventor: Hugh A. Stiffler